//上拉加载更多
var page=1;//当前页
var isEnd=false;//是否到底
var touch_py=0;
var rate=0;
$("body").on("touchstart",function () {  

     var touch = ev.targetTouches[0];
        touch_py = touch.pageY;
});
$("body").on("touchmove",function () {  

     var touch = ev.targetTouches[0];
       rate= touch_py - touch.pageY;
       console.log(rate);
});




























